package com.hchw.a01.activiti;

import org.flowable.engine.*;
import org.flowable.engine.history.HistoricActivityInstance;
import org.flowable.engine.impl.cfg.StandaloneProcessEngineConfiguration;
import org.flowable.engine.repository.Deployment;
import org.flowable.engine.repository.ProcessDefinition;
import org.flowable.engine.runtime.ProcessInstance;
import org.flowable.task.api.Task;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

/**
 * @ClassName : HolidayRequest
 * @Description :
 * @Author : Felix Huang
 * @Date: 2021-08-15 22:03
 */
public class HolidayRequest {
    public static void main(String[] args) {
        ProcessEngineConfiguration cfg = new StandaloneProcessEngineConfiguration()
                .setJdbcUrl("jdbc:h2:mem:flowable;DB_CLOSE_DELAY=-1")
                .setJdbcUsername("sa")
                .setJdbcPassword("")
                .setJdbcDriver("org.h2.Driver")
                .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);



        ProcessEngine processEngine = cfg.buildProcessEngine();

        RepositoryService repositoryService = processEngine.getRepositoryService();
        Deployment deployment = repositoryService.createDeployment()
                .addClasspathResource("holiday-request.bpmn20.xml")
                .deploy();

        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
                .deploymentId(deployment.getId())
                .singleResult();
        System.out.println("Found process definition : " + processDefinition.getName());

        Scanner scanner = new Scanner(System.in);
        System.out.println("Who are you?");
        String employee = scanner.nextLine();
        System.out.println("how many holidays do you wang to request?");
        Integer nrOfHolidays = Integer.valueOf(scanner.nextLine());
        System.out.println("why do you need them?");
        String desc = scanner.nextLine();

        Map<String, Object> variables = new HashMap<String, Object>();
        variables.put("employee", employee);
        variables.put("nrOfHolidays", nrOfHolidays);
        variables.put("desc", desc);

        RuntimeService runtimeService = processEngine.getRuntimeService();
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("holidayRequest", variables);

        TaskService taskService = processEngine.getTaskService();
        List<Task> tasks = taskService.createTaskQuery()
                .taskCandidateGroup("managers")
                .list();

        System.out.println("you have " + tasks.size() + " tasks: ");
        for (int i=0; i<tasks.size(); i++){
            System.out.println((i+1) + ") " + tasks.get(i).getName());
        }

        System.out.println("Which task would you like to complete?");
        int taskIndex = Integer.valueOf(scanner.nextLine());
        Task task = tasks.get(taskIndex - 1);
        Map<String, Object> processVariables = taskService.getVariables(task.getId());

        System.out.println(processVariables.get("employee") + " wants " +
                processVariables.get("nrOfHolidays") + " of holidays. Do you approve this?");

        boolean y = scanner.nextLine().toLowerCase().equals("y");
        variables = new HashMap<String, Object>();
        variables.put("approved", y);
        taskService.complete(task.getId(), variables);

        HistoryService historyService = processEngine.getHistoryService();
        List<HistoricActivityInstance> activities = historyService.createHistoricActivityInstanceQuery()
                .processInstanceId(processInstance.getId())
                .finished()
                .orderByHistoricActivityInstanceEndTime()
                .asc()
                .list();

        for (HistoricActivityInstance activity: activities){
            System.out.println(activity.getActivityId() + " took "
            + activity.getDurationInMillis() + " milliseconds");
        }



    }
}
